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Pacific Southwest Research Station
800 Buchanan Street
Albany, CA 94710-0011
Research Topics Water and Watersheds
About this Research:
Contributing Scientists and Staff
Kings River Experimental Watersheds (KREW)
KREW Data Collection
In 2000 work began to build the KREW project infrastructure within the eight study watersheds. It took approximately two years to complete the initial construction which includes stream gauging stations, sediment ponds, and meteorology stations, as well as installation of a variety of field sensors and data collection equipment.
Data collection on KREW began in 2002 for the Providence Creek locations and in 2003 for the Bull Creek locations. Data collection has continued throughout the pre-treatment phase of the project, providing nearly 10 years worth of stream discharge, water and soil chemistry, and meteorological data for the eight study watersheds. The KREW project was designed from the outset to continue for at least 15 years, including several years of post-treatment data, and several seasons of data that span successive treatments.
Data Transmission Network (Radio Telemetry)
This system uses the existing infrastructure of Forest Service FM radios, broadcasting on the least-used channels. It allows data to be retrieved automatically from remote forest sites and is working with ISCO and Campbell Scientific data loggers. A modem from Teledesign Systems solved the problem of transmitting data over a channel designed for voice communication. This modem has several features that allow it to work with radios, such as generating a push-to-talk signal to key the transmitter. Dual-tone, multifrequency (DTMF) signals, like those used by touch-tone telephones, are used to communicate and help manage power consumption.
The telemetry system runs off of the same solar-powered system as the stream discharge stations and meteorology towers at each location. Depending on the terrain between the host station or repeater and the remote sites, the 5-watt Bendix-King radios can transmit signals up to 80.5 km (50 miles). The system has been in continuous operation on the KREW project since July 2002.
KREW Data Available Online
Daily stream discharge and precipitation data are available on the Long Term Ecological Research (LTER) climate & hydrology database website.
Atmospheric deposition data are available on the National Atmospheric Deposition Program (NADP) website.
For other KREW data not available online, please contact Carolyn Hunsaker, lead scientist on the KREW project.
|Last Modified: Aug 26, 2016 04:57:51 PM|